Wedding advice - non-black waistcoats & jabot or not

[fingertrouble]

OK I mentioned on here about my Dad's wedding and I'm sorting out the kilt hire for me and my partner....so many options! Eek! It's end of September so still time.

Now my question is mainly about waistcoats - all the hire and other wedding examples I see online all have black waistcoats (or charcoal tweed?) - is a coloured / silk non-black waistcoat a no-no?

Reason I ask is I have a Victorian antique silk brocade waistcoat I want to wear...sort of a deep navy blue with gold brocade, and the tartan will be Lindsay Modern. Yes? No? Too much? Also non-kilt cut waistcoats are going to show more aren't they? Trying to think this through as much before the day as I'll be away from home when we're fitting/dressing so want as few nasties as pos...tempted to have the provided w/c as backup if it looks 'wrong'. Part of the reason for this is I don't want to look too identikit us both wearing the same tartan either - partner has a cream chinese brocade w/c which also might work - and brings in more personality of the wearer rather than a default hire 'uniform'. Also I'll wear a black bowtie, and him a jabot (or maybe cravat? If so I'll go with a colour reflected/complementary in the tartan, as with the flashes).

Also planning to go more the Prince Charlie route for jackets etc. - there's a high-cut waistcoat/very formal highlander option and another slightly cheaper PC option with low cut w/coat, or an Argyll which I also like but looks a little too casual.

Would the formal PC 'highlander' be too formal for a wedding? Any faux pass with that? I think my partner would prefer the more formal as he wants to wear a jabot...that comes with a cravat but I guess a jabot would work. Still think a jabot looks too formal though, but it's his tartan and his heritage so...;-)

BTW the wedding is in England, dunno if we'll be the only in kilts, but the bride's family does have Scottish links so maybe not. Certainly discussed it with both of them and it's very welcome! No swords or SD though, too expensive on the insurance....

I know many questions - but a lot of the research I'm doing it's very much about taste and opinion like a lot of kilt heritage seems to be, but I don't want us to both rock up and someone point out we've made some major FAIL :-(